The harmonious combination of nature, historical places and cultural sights characterizes Leipzig and its surroundings. The green ring around the city in the middle of the 'Leipziger Tieflandbucht' offers a great variety of landscapes, which are characterized by picturesque river valleys, heathlands and alluvial forests. In the swampy floodplains on the rivers Pleiße, Weiße Elster, Parthe and Luppe are many biodiverse forests. Leipzig is a cultural city, trade fair city, book city, music city and commercial city. Important sights are: the Old Town Hall, the New Town Hall, the Old Libra, the 'Barthels Hof', some Baroque town houses, the 'Alte Handelsboerse', 'Mäedler Passage', 'Auerbachs Keller', 'Thomaskirche', 'Nikolaikirche, the Russian Memorial Church, the 'Bosehaus', 'Gewandhaus', the Opera House, the 'Völkerschlachtdenkmal' and many more.